US6519160B1 - Pull type latch mechanism for removable small form factor electronic modules - Google Patents
Pull type latch mechanism for removable small form factor electronic modules Download PDFInfo
- Publication number
- US6519160B1 US6519160B1 US09/657,214 US65721400A US6519160B1 US 6519160 B1 US6519160 B1 US 6519160B1 US 65721400 A US65721400 A US 65721400A US 6519160 B1 US6519160 B1 US 6519160B1
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- United States
- Prior art keywords
- latch
- tongs
- latch mechanism
- pull
- release
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime, expires
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- 230000007246 mechanism Effects 0.000 title claims description 67
- 230000033001 locomotion Effects 0.000 claims abstract description 55
- 230000007480 spreading Effects 0.000 claims abstract description 11
- 238000003780 insertion Methods 0.000 claims abstract description 3
- 230000037431 insertion Effects 0.000 claims abstract description 3
- 230000014759 maintenance of location Effects 0.000 claims description 10
- 230000004075 alteration Effects 0.000 claims 1
- 230000000903 blocking effect Effects 0.000 claims 1
- 238000000605 extraction Methods 0.000 abstract description 5
- 230000009471 action Effects 0.000 description 7
- 230000000694 effects Effects 0.000 description 4
- 238000013461 design Methods 0.000 description 3
- 238000012986 modification Methods 0.000 description 3
- 230000004048 modification Effects 0.000 description 3
- 238000013459 approach Methods 0.000 description 2
- 230000005670 electromagnetic radiation Effects 0.000 description 2
- 239000000835 fiber Substances 0.000 description 2
- 230000000452 restraining effect Effects 0.000 description 2
- 230000000712 assembly Effects 0.000 description 1
- 238000000429 assembly Methods 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 230000001066 destructive effect Effects 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 239000012634 fragment Substances 0.000 description 1
- 230000002452 interceptive effect Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 230000013011 mating Effects 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
- 230000000717 retained effect Effects 0.000 description 1
Images
Classifications
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- H05K7/00—Constructional details common to different types of electric apparatus
- H05K7/14—Mounting supporting structure in casing or on frame or rack
- H05K7/1401—Mounting supporting structure in casing or on frame or rack comprising clamping or extracting means
- H05K7/1402—Mounting supporting structure in casing or on frame or rack comprising clamping or extracting means for securing or extracting printed circuit boards
- H05K7/1409—Mounting supporting structure in casing or on frame or rack comprising clamping or extracting means for securing or extracting printed circuit boards by lever-type mechanisms
Definitions
- This invention relates to the field of connecting cables or other devices to computers and, more specifically, to the latching of connectors and connections together to ensure reliable service and uninterrupted data transmission and reception.
- computers and servers are being interconnected with other computers and servers to form communications and data networks. Prodigious amounts of data and other communications are transmitted and received over such networks and require reliable connection of coaxial or fiber-optic cables either to the computer/server or to interface devices connected to the computer/server to insure continued and uninterrupted connections.
- Networked computers or servers typically operate continuously, twenty four hours a day, to provide the services or data that a computer or server is intended to provide to the remote computers upon demand.
- transceiver module to receive signals from the network cable and to transmit signals to the computer or server, or vice-versa.
- This type transceiver module may be designed in various versions, but all are compatible with the particular connector and port in a particular computer or server. Some transceivers can receive optical signals and output electronic signals to the computer and vice-versa. Other transceiver modules may be designed to receive electronic signals from the network cables and output or transmit computer compatible electronic signal and vice-versa. Transceiver modules are inserted into and connected to the data ports of a computer or server.
- the transceiver modules must be reliably latched into data ports and be retained against reasonable forces exerted on cables without being disconnected from the data ports. At the same time the latching of the transceiver modules must not be so resistive to unintentional disconnection forces that the transceiver module is damaged if the cables are pulled excessively.
- the latching devices preferably are disposed on the transceiver modules so that these latching devices are removed from the host device whenever the transceiver module is removed. Therefore, the latch itself cannot be left in the data port, unprotected as such, and face the possibility of breakage from impacts or forces exerted thereon. Such breakage is a problem presented by designs wherein the latch mechanism is not removed from the data port whenever a transceiver module is removed. Remaining as part of the host device, a latch is obviously exposed to damage, as it will project from the host device without a protective device to shield the latch device.
- the latch is designed and created to be an intentionally “weak link” in the retention apparatus to desirably protect the more expensive components from destructive forces, such as a transceiver module; those forces include those exerted by a person tripping over the cables or pulling excessively hard on the cables.
- latch mechanism prefferably replaceable on the device being latched to the host device.
- the invention is a module carrying a latch mechanism embodying a pair of pivoted tongs or pivoted arms which serve to position distal portions of each tong behind and interfering with a latch bar whenever in a latched condition.
- the tongs are pivotally disposed relative to an axis fixed relative to the device being latched onto a latch bar.
- the tongs are formed to present the input end and the distal end on the same lateral side of a common pivot axis such that an opening movement of the input ends is opposite in direction to a corresponding opening movement of the distal ends, and the closing movement of the input ends, likewise, is opposite in direction to closing movement of the distal ends.
- the input movement to the tongs is provided by a manually engageable and operable actuator member, otherwise referred to as a pull-tab.
- the actuator member is connected to a pair of input links through a post fixed to the actuator member which forms a common pivot axis for the input links.
- the input links are pivotable about the actuator member post and pivot axis and have further pivotable connections to the input ends of the tongs.
- the displaced input links pull the input ends of the tongs closer together.
- This movement of the input ends of the tongs acts to pivot the tongs and spread the distal ends of the tongs and remove the latching extensions of the distal ends from interference with a latch bar. This permits the extraction of the module or device, being latched to the latch bar and the latching mechanism from the receiving port of the host device, typically a computer or server.
- the latching of the latch mechanism is accomplished by placing the device to be latched into position within the host and pushing the actuator member inwardly toward the common tong pivot axis, which is fixed relative to the device to be latched. This pushing action displaces the actuator member and spreads the ends of the input links and the input ends of the tongs, moving the distal ends of the tongs closer together.
- the tongs deflection will allow the actuator member and input axis thereon to be moved past the dead center line interconnecting the input ends of the tongs and allow the actuator member to toggle over-center and detent the actuator in the latched and locked position, thereby locking the tongs in a locked position and preventing the removal of the transceiver module from the port in the host device.
- This detenting of the actuator member in a latched and locked position positively blocks and locks the latch tongs in a latched condition until the latch mechanism is undetented by pulling the actuator member outwardly and past dead center.
- FIG. 1 is a bottom isometric view of an electronic module carrying the latch mechanism of the invention disposed relative to a latch bar.
- FIG. 2 is an elevated left isometric view of an electronic module carrying the latch mechanism.
- FIG. 3 is an elevated isometric view of the latch mechanism and latch bar illustrated with the latch mechanism removed from the device being latched.
- FIG. 4 is an elevated rear isometric view of the latching mechanism and latch bar with a fragment of the latched module.
- FIG. 5 is a top view of one alternative form of the tongs of the latched mechanism.
- a bottom isometric view of a transceiver module 10 insertable within a port 18 in a bezel or shield 12 of a host device 14 , such as a computer or server, is illustrated.
- the host device 14 also includes a retainer member 16 or latch bar 16 supported by a portion of the host device 14 .
- the support may be on an electromagnetic radiation interference shield on a circuit board or a portion of the housing in the host device.
- Retainer member 16 preferably is a relatively rigid cantilevered beam structure which extends toward port 18 in bezel 12 .
- Retainer member 16 includes a generally upwardly extending flange 20 having a surface 22 which functions as a latch surface 22 or retention surface 22 against which the latching extensions 36 (best seen in FIG. 3) of tongs 34 engage to hold the transceiver module 10 in connection with the host device 14 .
- the transceiver module 10 is replaceable within the host device 14 , to change transceiver module types or to replace damaged modules, by unlatching the latch mechanism 24 and removing the transceiver module 10 from the host device 14 and inserting another similar transceiver module 10 , of the same or different type, in its place and relatching the replacement module. Due to the small size of the transceiver module 10 , push-to-release latches are counter-productive as their unlatching action tends to further seat a transceiver module 10 in port 18 and, thus, does not contribute to an extraction or removal operation.
- a push-to-release latch additionally requires a kick-out spring to eject a device once it is unlatched, to insure the latch does not relatch upon release of the push-to-release control.
- the tong 34 arrangement and its pulling action eliminates the need for such a kick-out spring as will be discussed later in this description.
- the transceiver module 10 carries the latch mechanism 24 for engagement with the retainer member 16 to accomplish latching. If broken or disabled, the latch mechanism 24 is easily repairable by the operator simply by replacing the inexpensive latch mechanism parts which furthermore eliminates the need for expensive service personnel and a service call and allows quicker return to service.
- the pull-tab 30 or actuator member 30 of latch mechanism 24 fits within or slides relative to housing 32 of transceiver module 10 and manipulates tongs 34 to engage and disengage the tongs 34 , and particularly the latch extensions 36 with and from the retaining surface 22 of latch bar 16 .
- bends 38 form a pivot for tongs 34 .
- a pull-to-release latch mechanism is advantageous both from a human factors viewpoint and from an economic standpoint.
- the transceiver module 10 is formed to create a slide channel 72 therein to accept the actuator member 30 .
- the actuator member 30 is moveable within channel 72 , relative to the transceiver module 10 .
- Actuator member 30 may be provided with a surface advantageously adapted for grasping by the operator's fingertips, such as ridges 26 or other roughened areas 26 .
- the actuator member 30 may be roughened, checkered or provided with any number of various surface irregularity patterns. Ridges 26 are shown in FIG. 2 but are omitted in FIGS. 1 and 4 for simplicity.
- Latch mechanism 24 is comprised of tongs 34 having latch extensions 36 disposed on the distal ends of tongs 34 .
- Tongs 34 are further formed with bends 38 . Bends 38 are formed with an inside radius substantially equal to or slightly larger than the radius of pivot post 40 which extends from the housing 32 , best seen in FIG. 1 .
- a backing member 50 may be formed or molded on the same surface of housing 32 , a portion of transceiver module 10 (FIG. 1 ), that supports post 40 .
- tongs 34 may be provided with journals 70 to encircle post 40 and obviating the need for backing members 50 .
- tongs 34 In order to constrain the movement of links 34 or tongs 34 and, particularly, bends 38 to a pivoting movement about post 40 , which insures that the input movement supplied to input ends 42 is efficiently translated into correlative movement of latch extensions 36 , it may be necessary to confine the bends 38 closely to post 40 . This confinement may be accomplished by any suitable means.
- One suggested approach is to form on housing 32 , closely displaced from post 40 , a pair of backing structures 50 with a sufficient spacing from the post 40 that the bends 38 of tongs 34 are slideably confined in close proximity to post 40 . Accordingly, tongs 34 will effectively pivot about post 40 whenever input forces cause displacement of the input end 42 of input arms 44 of tongs 34 .
- Input ends 42 of input arms 44 on tongs 34 are associated with input links 46 which may be provided with a post 48 .
- Each post 48 forms an axis about which input ends 42 of tongs 34 may pivot.
- Input ends 42 preferably may be formed with holes 49 which fit over post 48 .
- post 48 could be inserted into mating holes 49 formed in one end of input links 46 . Relative movement between input links 46 and input ends 42 of tongs 34 is permitted by this post 48 /hole 49 structure, not only allowing the input links 46 to be moved pivotally past dead center between posts 48 but also displacing the input ends 42 inwardly and outwardly.
- actuator member 30 or pull-tab 30 is connected to the input links 46 by post 56 about which input links 46 may pivotally move.
- the actuator member 30 and the post 56 are preferably integrally molded to produce a strongly supported post 56 and its axis 58 .
- any movement of the input ends 42 of tongs 34 will result in a pivot-like motion of the tongs 34 with a related pivoting movement of latch extensions 36 to spread or close the gap 52 intermediate the latch extensions 36 .
- This spreading or closing movement effects unlatching or latching, respectively, of the latch extensions 36 relative to retaining member 16 which serves as a latch bar 16 ; additionally, this action blocks extraction of the latch extensions 36 and, hence, the latch mechanism 24 without first spreading the latch extensions 36 to disengage the latch extensions 36 from the latch bar 16 and, particularly, the upturned flange 20 .
- input post 56 By pulling on or moving pull-tab 30 or actuator member 30 outwardly away from post 40 , input post 56 , which is attached to pull-tab 30 , is moved outwardly of transceiver module 10 . Movement of input post 56 will force input links 46 to pull together the input ends 42 of tongs 34 . Tong bends 38 and backing members 50 constrain tongs 34 to a pivoting motion about post 40 and the pivoting motion spreads latch extensions 36 apart as the input ends 42 of tongs 34 are moved toward each other.
- the movement of the pull-tab 30 outwardly or away from post 40 will initially spread input ends 42 of tongs 34 until the axis of post 56 passes dead center relative to posts 48 . If the latch extensions 36 are blocked from movement inwardly by latch bar 16 and flange 20 and during the undetenting of actuator 30 , this initial spreading of the input ends 42 of tongs 34 is absorbed by minor flexural deformation or flexing of the tongs 34 . Once passed dead-center, further movement of pull-tab 30 and input post 56 will pull input links 46 and cause posts 48 and input ends 42 of tongs 34 to be moved closer together. Such converging movement of posts 48 toward each other will cause a spreading of the latch extensions 36 , to disengage the latch extensions from interference with latch surface 22 of restraining member 16 .
- Latching of latch mechanism 24 is accomplished by forcing the electronic module 10 into the receiving receptacle (not shown) through the port 18 with the actuator member 30 fully extended and the latch extensions 36 of tongs 34 fully spread. With latch extensions 36 fully spread, the latch extensions 36 will pass the lateral ends of upturned flange portion 20 of the latch member 16 . Whenever fully seated, electronic module 10 will resist further insertion forces and the actuator member 30 then be pushed inwardly toward post 40 . Such inward movement of post 56 mounted on actuator member 30 will close the distance between input post 56 and post 40 , spreading input ends 42 of tongs 34 through pivoting of input links 46 .
- the materials from which the latch tongs 34 are fabricated may be chosen and dimensions designed to insure that the weakest portion of the latch mechanism 24 is the region of the tongs 34 that support the latch extensions 36 .
- the latch mechanism 24 can provide assured latching up to a predetermined force threshold and exceeding the force threshold will result in breaking the tongs 34 .
- the broken tongs 34 then will release the electronic module 12 .
- the tongs 34 may each be provided with journals 70 , thereby permitting the restraining members 50 to be eliminated. Journals 70 may be formed into the input ends 42 of tongs 34 to fit over post 48 for simplicity in assembly and replacement of broken tongs 34 .
- the tongs 34 preferably are deflectable to a limited degree to accommodate the latching and unlatching forces without breakage and to provide the biasing forces necessary for a complete detenting action described above.
- the biasing force capability into the tongs 34 , the need for separate springs is eliminated and, consequently, simplifying the latch mechanism 24 .
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- Engineering & Computer Science (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Mounting Of Printed Circuit Boards And The Like (AREA)
Abstract
Description
Claims (23)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
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US09/657,214 US6519160B1 (en) | 2000-09-07 | 2000-09-07 | Pull type latch mechanism for removable small form factor electronic modules |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US09/657,214 US6519160B1 (en) | 2000-09-07 | 2000-09-07 | Pull type latch mechanism for removable small form factor electronic modules |
Publications (1)
Publication Number | Publication Date |
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US6519160B1 true US6519160B1 (en) | 2003-02-11 |
Family
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Family Applications (1)
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US09/657,214 Expired - Lifetime US6519160B1 (en) | 2000-09-07 | 2000-09-07 | Pull type latch mechanism for removable small form factor electronic modules |
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US (1) | US6519160B1 (en) |
Cited By (13)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20030020986A1 (en) * | 1999-05-27 | 2003-01-30 | Pang Ron Cheng Chuan | Method and apparatus for pluggable fiber optic modules |
US20030059167A1 (en) * | 2001-04-14 | 2003-03-27 | Chiu Liew C. | De-latching mechanisms for fiber optic modules |
US20040033027A1 (en) * | 2001-04-14 | 2004-02-19 | Pang Ron Cheng Chuan | Cam-follower release mechanism for fiber optic modules with side delatching mechanisms |
US6796715B2 (en) * | 2001-04-14 | 2004-09-28 | E20 Communications, Inc. | Fiber optic modules with pull-action de-latching mechanisms |
US6846115B1 (en) | 2001-01-29 | 2005-01-25 | Jds Uniphase Corporation | Methods, apparatus, and systems of fiber optic modules, elastomeric connections, and retention mechanisms therefor |
US6863448B2 (en) * | 2001-04-14 | 2005-03-08 | Jds Uniphase Corporation | Method and apparatus for push button release fiber optic modules |
US20050201074A1 (en) * | 2004-03-10 | 2005-09-15 | Delta Electronics, Inc. | Pulling structure for an optical transceiving module |
US20060029332A1 (en) * | 2002-08-09 | 2006-02-09 | Jds Uniphase Corporation | Retention and release mechanisms for fiber optic modules |
US20070035922A1 (en) * | 2005-08-10 | 2007-02-15 | Hon Hai Precision Industry Co., Ltd. | Ejection apparatus for data storage device |
US20080117584A1 (en) * | 2005-02-04 | 2008-05-22 | Hardt Thomas T | Latching mechanism |
US20080168197A1 (en) * | 2007-01-04 | 2008-07-10 | Sandisk Il Ltd. | Peripheral device for connection with a host |
US20090176401A1 (en) * | 2008-01-07 | 2009-07-09 | Applied Optoelectronics, Inc. | Pluggable form factor release mechanism |
US20120314362A1 (en) * | 2011-06-09 | 2012-12-13 | Hon Hai Precision Industry Co., Ltd. | Computer chassis with hard disk drawers |
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US6246585B1 (en) * | 1997-12-11 | 2001-06-12 | Schroff Gmbh | Card-holding/locking device for the securing/latching of a printed circuit card/board |
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2000
- 2000-09-07 US US09/657,214 patent/US6519160B1/en not_active Expired - Lifetime
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US5971780A (en) * | 1996-10-16 | 1999-10-26 | Samsung Electronics Co., Ltd. | Mechanism for mounting and dismounting a pack assembly on a computer system |
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US6246576B1 (en) * | 1998-07-29 | 2001-06-12 | Dell Usa, L.P. | Computer mother board multi-position chassis drawer latch and release mechanism |
US6149465A (en) * | 1998-12-18 | 2000-11-21 | International Business Machines Corporation | Guide rail system with integrated wedge connector for removable transceiver |
US6288902B1 (en) * | 1999-05-25 | 2001-09-11 | Hewlett-Packard Company | Modular data storage system for reducing mechanical shock and vibrations |
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Cited By (29)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
USRE41147E1 (en) * | 1999-05-27 | 2010-02-23 | Jds Uniphase Corporation | Method and apparatus for pluggable fiber optic modules |
US20030020986A1 (en) * | 1999-05-27 | 2003-01-30 | Pang Ron Cheng Chuan | Method and apparatus for pluggable fiber optic modules |
US6846115B1 (en) | 2001-01-29 | 2005-01-25 | Jds Uniphase Corporation | Methods, apparatus, and systems of fiber optic modules, elastomeric connections, and retention mechanisms therefor |
US6814502B2 (en) | 2001-04-14 | 2004-11-09 | Jds Uniphase Corporation | De-latching mechanisms for fiber optic modules |
US20050013548A1 (en) * | 2001-04-14 | 2005-01-20 | Chiu Liew C. | Fiber optic modules with a lever-actuator de-latching mechanism |
US20040033027A1 (en) * | 2001-04-14 | 2004-02-19 | Pang Ron Cheng Chuan | Cam-follower release mechanism for fiber optic modules with side delatching mechanisms |
US6796715B2 (en) * | 2001-04-14 | 2004-09-28 | E20 Communications, Inc. | Fiber optic modules with pull-action de-latching mechanisms |
US6811317B2 (en) | 2001-04-14 | 2004-11-02 | Jds Uniphase Corporation | De-latching lever actuator for fiber optic modules |
US20030133667A1 (en) * | 2001-04-14 | 2003-07-17 | E2O Communications, Inc. | De-latching mechanisms for fiber optic modules |
US6832856B2 (en) | 2001-04-14 | 2004-12-21 | E2O Communications, Inc. | De-latching mechanisms for fiber optic modules |
US20030133665A1 (en) * | 2001-04-14 | 2003-07-17 | Chiu Liew C. | De-latching lever actuator for fiber optic modules |
US20030133666A1 (en) * | 2001-04-14 | 2003-07-17 | Chiu Liew C. | De-latching mechanisms for fiber optic modules |
US6863448B2 (en) * | 2001-04-14 | 2005-03-08 | Jds Uniphase Corporation | Method and apparatus for push button release fiber optic modules |
US20050117854A1 (en) * | 2001-04-14 | 2005-06-02 | Chiu Liew C. | Fiber optic modules with de-latching mechanisms having a pull-action |
US20030059167A1 (en) * | 2001-04-14 | 2003-03-27 | Chiu Liew C. | De-latching mechanisms for fiber optic modules |
US6974265B2 (en) * | 2001-04-14 | 2005-12-13 | Jds Uniphase Corporation | Fiber optic modules with de-latching mechanisms having a pull-action |
US20060029332A1 (en) * | 2002-08-09 | 2006-02-09 | Jds Uniphase Corporation | Retention and release mechanisms for fiber optic modules |
US20050201074A1 (en) * | 2004-03-10 | 2005-09-15 | Delta Electronics, Inc. | Pulling structure for an optical transceiving module |
US7433569B2 (en) * | 2004-03-10 | 2008-10-07 | Delta Electronics, Inc. | Pulling structure for an optical transceiving module |
US20080310136A1 (en) * | 2004-03-10 | 2008-12-18 | Lung-Hua Huang | Optical transceiving module |
US20080117584A1 (en) * | 2005-02-04 | 2008-05-22 | Hardt Thomas T | Latching mechanism |
US7466544B2 (en) * | 2005-02-04 | 2008-12-16 | Hewlett-Packard Development Company, L.P. | Latching mechanism |
US20070035922A1 (en) * | 2005-08-10 | 2007-02-15 | Hon Hai Precision Industry Co., Ltd. | Ejection apparatus for data storage device |
US7681210B2 (en) * | 2005-08-10 | 2010-03-16 | Hong Fu Jin Precision Industry (Shenzhen) Co., Ltd. | Ejection apparatus for data storage device |
US20080168197A1 (en) * | 2007-01-04 | 2008-07-10 | Sandisk Il Ltd. | Peripheral device for connection with a host |
US20090176401A1 (en) * | 2008-01-07 | 2009-07-09 | Applied Optoelectronics, Inc. | Pluggable form factor release mechanism |
US7766686B2 (en) | 2008-01-07 | 2010-08-03 | Applied Optoelectronics, Inc. | Pluggable form factor release mechanism |
US20120314362A1 (en) * | 2011-06-09 | 2012-12-13 | Hon Hai Precision Industry Co., Ltd. | Computer chassis with hard disk drawers |
US8493729B2 (en) * | 2011-06-09 | 2013-07-23 | Hon Hai Precision Industry Co., Ltd. | Computer chassis with hard disk drawers |
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